Environmental monitoring at Hanford for 1987: Surface and Columbia River data

Jaquish, R.E.

doi:10.2172/7126177

Cited by 7 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distribution of uranium in the 300 Area during 1987 is illustrated in Figure 6.43 . Subsequent monitoring reports indicated that the distribution of uranium in the aquifer in the 300 Area was similar to that observed during previous years (Jaquish and Mitchell 1988;Bryce 1989, 1990) .…”

Section: Radionuclide Movement In the 300 Areasupporting

confidence: 73%

“…The average monthly differences of tritium and iodine-129 measured at locations upstream and downstream of the Hanford Site continued to be statistically significant during 1987 through 1989 (Jaquish and Mitchell 1988; 6.78 Bryce 1989, 1990). Differences between tritium and iodine-129 concentrations at upstream and downstream locations were also significant when compared annually (see Figures 6.44 and 6.45).…”

Section: Summary Of Resultsmentioning

confidence: 93%

“…Eddy and Wilbur (1980) reported that during 1979 more wells were sampled for iodine-129 than in previous years. The distribution of wells for Eddy and Wilbur (1980); Eddy, Cline and Prater (1982); Eddy, Prater and Rieger (1983); Prater et al (1984); Cline, Rieger and Raymond (1985); Price (1986); PNL (1987); Jaquish and Mitchell (1988);andBryce (1989, 1990).…”

Section: Iodine-129mentioning

confidence: 99%

See 2 more Smart Citations

Ground-water contribution to dose from past Hanford Operations

Freshley¹,

Thorne²

1992

View full text Add to dashboard Cite

Section: Radionuclide Movement In the 300 Areasupporting

confidence: 73%

Section: Summary Of Resultsmentioning

confidence: 93%

Section: Iodine-129mentioning

confidence: 99%

See 1 more Smart Citation

Ground-water contribution to dose from past Hanford Operations

Freshley¹,

Thorne²

1992

View full text Add to dashboard Cite

“…The ground water is routinely and extensively monitored to trace the movement of contaminants and to determine any impact from the site to the public (Graham et al 1981). Ground-water monitoring reports are produced annually (e.g., Jaquish and Mitchell 1988;Serkowski et al 1988). …”

Section: Unconfined Aquifer Systemmentioning

confidence: 99%

“…Water-level data have 4.6 .. also been documented in previous reports and in semiannual water-table maps (e.g., Schatz and Ammerman 1988). Ground-water chemistry data have been published in annual environmental reports (e.g., Jaquish and Mitchell 1988;Serkowski et al 1988) .…”

Section: Data Basesmentioning

confidence: 99%

Hydrogeology of the 200 Areas low-level burial grounds: An interim report: Volume 1, Text

Bjornstad¹,

Bergeron²,

Wallace³

et al. 1989

View full text Add to dashboard Cite

Ground-water contribution to dose from past Hanford operations

Freshley¹,

Thorne²

1992

View full text Add to dashboard Cite

The Hanford Environmental Dose Reconstruction (HEOR) Project is being conducted to estimate radiation doses that populations and individuals could have received from Hanford Site operations from 1944 to the present. Four possible pathways by which radionuclides originating in ground water on the Hanford Site could have reached the public have been identified: 1) through contaminated ground water migrating to the Columbia River; 2) through wells on or adjacent to the Hanford Site; 3) through wells that draw some or all of their water from the Columbia River (riparian wells); and 4) through atmospheric deposition resulting in the contamination of a small watershed that, in turn, results in contamination of a shallow well or spring. These four pathways make up the "ground-water pathway , " which is the subject of this study. The objective of the study was to assess the extent to which the groundwater pathway contributed to radiation doses that populations or individuals may have received from past operations at Hanford. The assessment presented in this report was performed by 1) reviewing the extensive •literature on ground water and groundwater monitoring at Hanford and 2) performing simple calculations to estimate radionuclide concentrations in ground water and the Columbia River resulting from groundwater discharge. Radiation doses that would result from exposure to this ground water and surface water were calculated. The study conclusion is that the groundwater pathways did not contribute significantly to dose. Compared with background radiation in the Tri-Cities {300 mrem/yr), estimated doses are small: 0.02 mrem/yr effective dose equivalent from discharge of contaminated ground water to the Columbia River; 1 mremjyr effective dose equivalent from Hanford Site wells; 11 mremjyr effective dose equivalent from riparian wells; and 1 mrem/yr effective dose equivalent from the watershed. Because the estimated doses are so small, the recommendation is that further work on the groundwater pathway be limited to tracking ongoing groundwater studies at the Hanford Site. ix # xiv The maximum dose estimated with a simple calculation for the watershed pathway was 1 mrem/ yr effective dose equivalent (during 1945) for a range of possible parameters used. Ruthenium-106 was the only radionuclide predicted to reach the hypothetical well or spring through the shallow groundwater system in significant concentrations. CONCLUSIONS AND RECOMMENDATION Analyses of the groundwater pathways led to the conclusion that gro~nd water did not make a significant contribution to dose during the study period, 1944 to the present. The dose estimates are small compared with doses from average natural background radiation (300 mrem/yr) in the Tri-Cities (Jaquish and Bryce 1990). People in Richland, Pasco and Kennewick who get their drinking water from the Columbia River would be the primary group potentially exposed to groundwater discharges to the river. Both the dose estimates from published literature and calculations performed to address the o...

show abstract

Environmental monitoring at Hanford for 1987: Surface and Columbia River data

Abstract: <-Result less than detection l i m i t ()-Uncertainty f o r r e s u l t. NR-No r e s u l t reported. nra-Not r o u t i n e l y analyzed.

Cited by 7 publications

References 0 publications

Ground-water contribution to dose from past Hanford Operations

Ground-water contribution to dose from past Hanford Operations

Hydrogeology of the 200 Areas low-level burial grounds: An interim report: Volume 1, Text

Ground-water contribution to dose from past Hanford operations

Contact Info

Product

Resources

About